Adjustable mounting for electric bulbs



June i0, 1930. w, B, YQUNG ADJUSTABLE MOUNTING FOR ELECTRIC BULBS FiledJan. 2l, 1929 INVENTOR ATTORNEY Patented .lune 10, 1930 UNITED STATESPATENT OFFICE WILLIAM YOUNG, P'ULASKI, VIRGINIA ADJUSTABLEPMOUNTING FORELECTRIC BULBS Application led January 21, 1929. Serial No. 333,917.

whereby one'or more Yelectric bulb sockets can be easily adjusted on asupporting mem-`- ber so that `the lamps or bulbs can be placed in anydesired 'position on thelsupporting member, vthus eliminating the use ofa plurality of stationary sockets and their connections for enabling thelamps or bulbs to be placed in different positions on the supportingmember. f

I Another object of the invention is to provide simple means for lockingthe socket or sockets in adjusted position and at the same time bringingthe contacts of the socket or sockets in firm engagement with a pair ofconducting members so asto secure a good electrical connection betweenthe parts.

This invention also u consists in certain other features of constructionand in the combination and arrangement of thel several parts, to behereinafter fully described, illustrated in the accompanying drawing andspecifically pointed out in the appended claims. e

InA describing the invention in detail, reference will be had to theaccompanying drawing wherein like characters denote like orcorresponding parts throughout the. several views, and in which .Figure1 isa transverse sectional view through the invention.

. Figure 2 is a fragmentary top plan view with parts broken away. pFigure 3 is an end view. Figure 4 is a sectional detail View show ing aplug inserted inthe end of the casing and engaging one of the conductormembers with one of the rollers engaging said me1nber.

Figure 5 is a sectional detail view showing how a roller is electricallyconnected with l a conductor of the socket.

with a longitudinally extending slot 2 in A its indicates thecasing ofthe device which 'is-formed upper or outer part and 3 indicates a memberof non-conducting material and of substantially T shape, with oneportion thereof suitably connected with the base of the casing, such asmaking this port-ion of Wedge shape and providing the casing with theflanges 4 for engaging the wedge-shaped portion, as shown in Figure l. Aconductor strip 5 is embeddedin-each end of the horizontal part 'of themember 3 and' each 'strip is so shaped as to provide a tubular part 6which depends fromthe member 3 andl forms an electrical conductor. Theends of the casing are closed by the detachable plates 7 and`one ofthese plates is formed with holes to receive the plugs 8 which havetheir inner reduced portions fitting in the ends of the tubular parts 6so that when these plugs are connected with a suitable source of supply,said tubular parts of the strips 5 will form parts of the positive andnegative sides of the supply -line and current will flow through thestrips when the twostrips are bridged, as will be hereinafter described.Each lamp socket 9 is attached to a tubularv stem 10 which passesthrough the slot 2andV the inner end of the stem is vformed with thetubular 'branches l1, these branches being of substantially U-shape sothat they extend means of the plugs 16 inserted in the free ends of thebranches and havingtheir reduced ends 17 entering sockets formed in thereduced ends 18 of the shafts.

Thel stem 10 is threaded, as shown at 10, and anut 19, having a handle20, engages the stem. lA washer 21 is placedpn the stem' between/the nutand casing.,

Fromjhe foregoing-it will be seen that with the parts-arranged las shownin Figure the roller 1, by loosening the nut the socket 9, with the bulbtherein, the stem and its branches can be moved lengthwise of the casingand that during this action, the rollers will roll over the tubularconductors 6. Vhen the socket has been moved `to the desired position,the nut is tightened, which will lock the socket and its associatedparts in adjusted position .on the casing and at the same time so movethe parts that the rollers Will firmly, press against the conductors 6.Thus current will pass from one of the conductors 6 through and shaftand the plug `16, through aconductor, 15 to the socket and bulb andreturn through the other conductor 15 through the other roller to theother conductor 6. Thus the socket and-its bulb can be readily adjustedto any desired position relative to the casing Without breaking theelectrical connection.

This invention avoids the use Vof a plurality of stationary sockets forenabling lamps to be pro erly spaced or placed on a supporting mem r.

For instance, Figure 6 shows the invention used with a -sign A. pair ofthe devices is placed in the sign casing; as shown at B, With the lampsL adjusted so that they will come opposite the letters of the sign. Thusthe lamps can be properly adjusted so that their rays of light will passthrough the letters no matter how the letters are arranged on the slgn.i

It will, of course, be understood that the'inventioncan be used invarious locations. For instance, it can be-used with a single lamp on adesk-so that the lamp can be moved to a position on the desk Where itwill give the best light to the user.. Of course, more than one lamp canbe used `on a desk. The invention can 'also be used for thefootlights/in y theatres and the like and in show Windotvs,

-on the walls and ceilings ot' a room and 1n any other location where anadjustable mounting of electric lamps is desired.

It is thought from theforegoing description that the advantages andnovel features of the invention will be Vreadily apparent.

It is to be understood that changes may be4 made in ythe constructionand in the combination and arrangement of the several parts, provided,that such changes fall within the scope of the appended claims.

What I claim is 1. A device of the class described comprising a casinghaving a slot therein, .a pair of conductor members in the casing, atubular stem passing through the slot and *having branches on its innerend vvith parts of the branchesengaging the conductor members, a bulbsocket on the outer end of the stem and conductors leading from thesocket and passto the socket from the conductor members .I

Ilongitudinally extending conducting members in the casing, a tubularstem passingthrough the slot and having branches on its inner end,rollers carried by the free ends of the branches engaging the conducting.members. a bulb socket on the outer end of the stem,9 conductorsleading from thel socket through the stem and its branches andelectrically connected with the rollers and means for holding the stemand its associated parts in adjusted position on the casing. I

3. A device of the' class described ,comprising a casing having a slottherein, a pair of longitudinally extending conducting members in thecasing, a tubular stem passing through thevslot and havin branches onits inner end, rollers carried y the freeends of the branches vengagingthev conducting` members, a bulb socket on the outer end of the stem,conductors leading from the socket through the stem andlits branches andelectrical being exteriorly threaded anda nut Von the threaded part forclamping the stem to the casing.

4. A evice of the class described comprising a ca ing having a slottherein, a pair. of longitu inally 'extending conducting members in thecasing, a tubular stem passing through the slot and having branches onits inner end, rollers carried by ythe free ends of the branches enaging the conducting members, a bulb socet on the outer end of the stem,conductors leading from the socket through the stem and its branches andelectrically connected with the rollers, the stem being exteriorlythreaded, a nut on the thread ed part for cla ing the stem to the casingand su porting 1 eans of non-conducting material or theconductihgmembers.-

In testimony whereof I aix my signature.

WILLIAM B. YOUNG.

ing through the stem and its branches and connected with the conductorengaging parts of the branches wherebyl current, will ioW connected withthe rollers, the stem

